That woman said she had been released by the kidnappers not too far away and had walked back to the house, Parker said.

The released woman told detectives four Hispanic males had come into the house and there could have been more outside. Parker said there is no good description of the suspects, but they were in a white van believed to be a Ford, with a blue stripe on its side and paper tags.

The missing people are two married couples, and a couple's 6-month-old daughter, Parker said. He said an Amber Alert was issued because of the abduction of the baby.

Parker said the motive for the kidnappings is unknown.

Anyone with information is asked to call the Harris County Sheriff's Department at 713-967-5810.